The Application of Nonlinear PID Controller in Generator Excitation System

Aimming at the control problem of generator excitation system, this paper brings forward a kind of nonlinear PID controller. The controller's proportional, integral and differential values are nonlinear functions of error function that the algorithm is simple and easy to realize. Simulation results show that the generation excitation system designed with this controller is much better than the traditional PID controller. It solves contradiction between rapidity and overshoot and then the dynamic performance and control accuracy of terminal voltage have been improved.